"On the ... state of anatomical symmetry, we could assure that there are not absolutely spatially symmetrical arrangement of organs.... For example, human beings have a liver at the upper right side of the abdomen which is not at the left side; in addition, when we look at bilateral organs, a body is different in size and functionality with the homologous organ; e.g. a kidney will work with greater capacity than the other, or will be smaller than the other, etc." (Where etc may point to other organs, such as hands, feet, arms and legs)

For example concerning the hand grip strength, and pinch strength and hand dominance: the 10% rule.

Quote: The 10% rule states that the dominant hand possesses a 10% greater grip strength than the nondominant hand. The same is true of the three different pinching tactics. This rule has been used for many years to assist therapists in setting strength goals for patients with injured hands.

More recent studies put the difference in hand grip strength around 12%. In left handed people the difference tends not to be so dramatic.